Feed grinder



M. F. WILLIAMS.

FEED GRINDEH. APPLICATION FILED APILZIS. 1919.

Patented June 69 i922..

, f SeIIIIIIIIIIIIIIJI l Incanto/c MHTDN E'. TJELIIARIS, 0I ST. LGUIS, MISSOUELASSIGNOR TO WILLIAMS PATENT CRUSHER da YOLVEBIZER CO., 0F ST LOUES, MISSGUR, A CORFOEATION 0F MIS SOURX.

imanes.

Specification of Letters Patent.

Patented June 6, 1922.

Application filed April as, 1919. Serial No. 293mm; v

To al! whom, 'il' may concern.' 4

Be it known that; l, Mufron. lli/viLLIaMs, a citizen of the United Stables, residingei St, Louis7` Siate of Missouri, have invented certain new and useful improvements in -Feed Grinders, of which the'iollowing is a speciiication.

This invention relates to certain new and useful improvements in feed grinder the peculiarities of which will be herein aier described and claimed.

The main objectl of my invention. is the provision of means adapted to break and separate the coarse broken Aiced from the fine particles; secondly to vary che feed inlet; thirdly to separate the iinest'pariiicles from che medium ground andA ourt-hly5 to provide a special 'form of siirrup hammer having a special form of cross-bar' head connecting theispaced shrinks.

ln grinding chicken feed such as corn., oyster shells and so fortb.,it is desirable .to eiifect a preliminaijT breaking or grinding of the feed to coarse particles with little dust and to separate the coarse -from die finest particles, end then to grind `he coarse bal. ance to medium'particles as hereinafter described. i

in the 'accompanying drawing on which like reference'leiters indicate corresponding;

parte, Fig. 1 represents a Vertical secitnial elevation of a machine embodying my invention,.-'tlie section being taken near the center and across the shaft of the rotor; Fig; 27 a front View of the Same with portions of the hopper broken away to show the adjustable slide, and other parts of the cas ing broken away to show' .the breaker plate and cage; Fig. 3, a face -view of a modified form of breaker plate from. that shown in Figs l and 2; Fig. Il, a vertical section oi said plate on the line 2-2 of Fig. 3; and Fig. 5, a similar sectional View on the line 3--3 of Fig. 3. v

The letter A designates a rotor shaft on which is mounted pivoeed hammers oi che kind having two Shanks spaced apars and ivoted at their inner ends eccentric to the shaft and connected at their outer ends by a cross bar head. B cooperating with a cage C oi perforated nietal or other ssii,- able design, mounted in a suitable easing D surroundingn and enclosing the rotor, and having a feed hopper E comprising an inclined front wall F andan opposite wall Gr converging downward toward the front wall. A pocket is formed in the casin below the feed hopper by a Wall H behin a breaker plate, the from'l face of which plate is in line with the inclined Wall F vof the feed hopper. The said casing is preferably open at; the sides opposite this pocket for* the breaker plate, so that the said breaker plate may be inserted sideways inse said pocket and rest against said Wall H.

This breaker plaine is hollow and has a perforaie freni, fece l. with backwardly extending rib J ai. the bop,.`and side ribs K, which lait-ier close the openings in the side of the casing when the breakerv plate is in its located position, and Jforno, together with the casing wail l-La. chamber back of the perforaie face for the reception of the coarser particles ofnhe feed `that. pass the openingeL in said face. A frame is thus formed supporting 'the front 1ace and open Aat the botto-rn for the discharge of the particles entering said chamber. Below the pocket is a passage M communicating with the chamber of the breaker plate and separased from the balance of the material discharged through the-cage C, by a partition wall N or other sniisable means. The openings L in the breaker rplaise are of diierent size, preferably larger, than the openings in `ihe cage C. The 'feed material 'surfers a preliminary breaking upon the breaker plate and a. large proportion of it passes through the openings into the discharge passage M communicating "with the chamber of the breaker plate.

A cert-ain amount of fine particles and dust onward bo a suitable compartiment for stort.

age.

ln Figs. l and 2J have shown a hollow breaker plate with a smooth face and peroreiions therein," 'weh-as s plete steel face fastened by screws or otherwis:V to the supporting frame. ln Figs. 3, 4 and 5,1 have shown a modified breaker plate in which the perforatioiis L are proyided with guiding and deecting angular projections, prefera- -of said projection is preferably concave as shown iii Fig. 3 and directly adjacentand below the hole L, so that the preliminary breaking effected by said projectionsin conjunction with the hammers will facilitate the discharge ofthe particles through 4the respective holes L. The sides of the angular projection guide the broken particles that do not enter the adjacent hole, to the lower hole adjacent. y The said holes are preferably al ternately`disposed in horizontal rows with the angular projections, and also alternate in vertical rows, es shown in Fig; 3.

The preferred style of pivoted hammer to cooperate with this perforated `breaker plate, is that shown in Fig. l, in which the outer surface of each hammer Bis part of a cylinder the center of which is the vpivot on which the hammer is mounted parallel toI the shaft A. The circular width of the head of the hammer is substantially the length of the hammer froiir the pivot to the outer cylindrical surface, so that each hammer constitutes part of' a jaw roller, and some element of`this outer surface is always in 'close proximity to the ca ge or breaker plate when opposite. rThe inner face of each head is a plane as shown, or otherwise formed to intersect at a sharp angle the forward and rear edges of the cylindrical outer surface of the head, and thereby constitute a sharp cuttingedge adapted to pass easily through the material being1 reduced in the rotor chamber. and cut the same. The cylindrical outer face of each liaiiinier,-beiiig` curved on a shorter radius than the' cage, normally forms a decreasing throat from the front edge of the hammer to that clement iii the face of the head that is nearest to the cage, and when the vmaterial enters this throat it retards the hammer and causes the head to roll backward about` its pivot andthus bring its forward edge nearer to the cage. This jawrolling movement diminishes the-size of the throat as the front edge rolls back closer to the cage and tends to crush with a jaw-closing action, any 'material engaged by the throat of the hammer. When the hammer is operatingr opposite the perforated breaker plate, this crushing rollenjaw action forces the material through the perforations in said plate. The projections on the breaker plate shown in Figs. 3,4 and 5, assist the .l

roller acting hammer base in reducing the material, and the concave tops of said projections guide the crushed particles through the adjacent openings like spouts directing the material to the openings. In co-operation with the cage, the rolling outer surfaces of said hammers first crush and then force the material through the openings in the cage. f

The walls ofthe casin are extended up wai-d at D above a partition wall a substantially iii line with the cage y(j which. forms an outlet opening 6 opposite the feed hope per, for the material being ground` in said cage. Through this back opening the hammers dischar e some of the material and any foreign meta that ymay enter with the feed, into the chamber between the walls D and d which constitute a metal catcher above the rotor. At the side or elsewhere in the cas- 1 ing, an opening 7 is provided connecting to a pipe 8 under air suction, in order to draw oft the nest particles as indicated inFig. 1.

of the cage and Athus exerts a crushing action upon the material interposed between the outer convex surface of the hammers and the concave surface of a larger radius of the cage, :is well as the fiat inclined surfae. of

the perforated breaker plate. The inner surface of cach liain'mer is practically a, straight face transverse to the Shanks and" therefore the plane of the inner face cuts the convened outer face at the front and the rear of each hammer and forms sharp frontend rear edges, capable of being vrei'ersed when' one edge is dulled and al new edge is desired; The Shar-p edges of each bilateral and reversible head pass through the material being reduced with little obstruction, as the radial thickness between the front' and rear edves is relatively small. compared withthe width from front to rear edge. Thi-is the material that is not caught between the convenY outer face ofthe hammer andthe concave face of the cage will bedivided by the sharp edge of each hammer and flow past the hammer on the inner side of the head and be caught by the next succceding'hammer and subjected to the crushinggrinding action exertedby the pivoted hammer with outer cylindrical face disposed eccentric to thc. grinding Surface of the cage.

I claim: l j i,

1. feed grinder comp'risiii,5l a breaker plate, having on its face rows o-f alternating hammers, and a casing for said breaker head the outer cylindrical surfaceof which -ground thereon, from that passing through .having ,pivoted' hammers each 'consisting of mer and acts like a jaw roller upon the ma 45 Ethe outer surface in acute angles at front throughoutthe entire length of said head.

holes and angular projections,-said projecopening in said lower rontwall and com` tions ,having three sides converging upward municating with said passage to a blunt point at its maximum Vprojection 6. A feed grinder'comprising a rotor, a that is located below the respective hole in cage, a perforated hollow breaker .plate havthe row above, and a casing having walls ing its lower end lying in the of said formmg a chamber behind and shut in by rotor, and a casing for said rotor and break-- said breaker plate, substantially as deler plate having a portion of its walls at the scribed. c, i `front adjacent to the breaker plate, and

2. A feed grinder comprisinga breaker partition wall parallel and adjacent to the plate, having angular projections inclining front wall and below the breaker plate and upward and outward from its face andfhavforming a discharge passag, leadin from ing sldes converging upward and ending'inf said breaker plata-*said casing also avingij a point of maximum projection with'a con-` walls at the top and back which, together cave upper face, and holes rcspectivel located above said projections and coincid ing withrthe concave tops, and casingv walls forming a .chamber behind said breaker plate, whereby the material broken on said projections is directed through said openings into said chamber, substantially as described.

3. A feed grinder comprising rotary hammers, a perforated breaker plate having its lower edge located in the path of the han, mers, an adjacent cage co-acting with said with the rotor, form a metal catcher abovf.` said'v rotor,said discharge passage and metal catcher having outlet openings adapt ed for connection to suction means. Y 7. A grinder cimfip'rising a casing, includ.- ing a cylindrical, grinding surface, a shaft, hammer 'supportsmounted on said sha-lf3. and hammers consisting of Shanks space-f. Aapart the width ort the grinding surface an pivotally mounted by their innerA enr-'Is o said supports, and each connected at their louterends by a cross bar head the outer surA face of which is convex and disposed eccentrically tothe grinding surface of the eager# the forward portion oeach head terminating in an acute anglel forming a. sharp edge which extend head. n

8. A grinder comprising-a vcasing includ ing a cylindrical grinding. surface, a shaft, pivoted hammers operatively moimtedion said shaft, each osaid hammers terminating; at its free end in a head the outer surface of which is' convexed and disposed` eccentrically to the grinding surface of the cage, and each head being bilateral with outer andinner faces that form sharp front and rearedgcs parallel to the shaft,said edges being reversible.

` 9. A grindertcomprising' rotary -pivoted terial being` ground in'- the throat formed bynhammers each having a head .the outer surthe forward portion of said hammer and the faceof which is a cylindrical plane struclr adjacent cage and `breaker plate; 4and the from substantially the pivot olntj as a cen`l inner surface between said shmksv meeting ter, and the inner face of tie head being substantially a plain dat face that intersects the outer convex face in a sharp edge at the front and rear parallel to the pivotal axis,- 5. A feed grinder comprising a casing the radial thickness midway between front having a wall atthe front opposite a breaker and rear edges being relatlvely small com plate, hammers and cage,` and having a discharge outlet below the breaker plate and having walls forming a communicating4 chamber behind said breaker plate, and formingalso a partition for said discharge outlet-adapted to separate the material pass ing through said 4breaker plate after being said eag [substantially as described.

d. A grinder comprising a casing, a irreale:m er plate, a cage, and a rotor in said casingl Shanks spaced apart and pivoted eccentric to the axis of the rotor at their inner ends and connected at their outer end sby a cross bar is struck from the pivotal center of said hamand rear formi Asharp cutting edges1 plate forming a pocket, and a partition wall pared to the width between said edges so as below the breaker plate, another lower porjto adapt theA long sharpedged head. to pass tion of the front wall parallel to said partithrough the material, being reduced with tion wall and forming adischarge passage relatively small resist-ance. v communicating with said pocket,-a hollow In testimony whereof I have elirred my breaker plate havinga perforate face c xsignature. tending across said pocket above said discharge passage, and a pipe connected to an IVHLTON E WILLIAMS.

with an adjacent partition wall concentric 7i s throughout the length of the lidi 

